Advertisements
Advertisements
प्रश्न
A student obtains a blurred image of a distant object on a screen using a convex lens. To obtain a distinct image on the screen he should move the lens
(A) away from the screen
(B) towards the screen
(C) to a position very far away from the screen
(D) either towards or away from the screen depending upon the position of the object
उत्तर
To obtain a distinct image on the screen the student should move the lens towards the screen because in order to obtain a sharp image the screen should be near the lens and the object is at a distance so it means that we can get a sharp image only when the screen is near the lens.
Hence, the correct answer is towards the screen.
APPEARS IN
संबंधित प्रश्न
What is the advantage of using a convex mirror as rear-view mirror in vehicles as compared to a plane mirror? Illustrate your answer with the help of labelled diagrams.
Give two uses of a convex mirror. Explain why you would choose convex mirror for these uses.
A convex mirror used as a rear-view mirror in a car has a radius of curvature of 3 m. If a bus is located at a distance of 5 m from this mirror, find the position of image. What is the nature of the image?
Write true or false
At the point of incidence, a line drawn at right angles to the surface, separating the two media, is called the normal.
A .............. mirror is obtained on silvering the outer surface of a part of a hollow glass sphere.
The mirror used as rear-view mirror in vehicles ______.
Assertion: A real image cannot be produced by plane or convex mirror.
Reason: The focal length of a convex mirror is always taken as positive.
What do you observe when an object is placed anywhere between P and infinity in front of a convex mirror?
Why a convex mirror is preferred for rearview mirrors in cars?
